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On November 10, 2021, the Postal Service (USPS[supreg]) filed a notice of intent to implement Plus One as a permanent product with the Postal Regulatory Commission (PRC), effective January 9, 2022. This final rule contains the revisions to Mailing Standards of the United States Postal Service, Domestic Mail Manual (DMM[supreg]) to adopt Plus One mailpiece as a permanent product.